<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Document</title>

    <style>
      /* 内嵌样式 */
      p {
        color: red;
      }
    </style>

    <!-- 外联样式 -->
    <link rel="stylesheet" href="./css/index.css" />
  </head>
  <body>
    <!-- 行内样式 -->
    <h1 style="color: red; font-size: 19px">h1</h1>

    <p>p</p>

    <div>div</div>
  </body>
</html>
